Gold-saving apparatus.



No. 818,834. PATENTED APR. 24, 1906. I. P. LAMBING. GOLD SAVINGAPPARATUS.

APPLICATION FILED MAY 1, 1905.

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UNITED PATENT OFFICE.

GOLD-SAVI NG APPARATUS.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed May 1,1905. Serial No- 258,343.

To all who/11. it may concern:

Be it known that I, Isaac P. LAMBING, a citizen of the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented new and useful Improvements in Gold-Saving Apparatus, of whichthefollowing is a specification.

My invention relates to a device for saving gold in placer, gravel, orhydraulic mining where free gold is to be found.

It consists of a riflle or riffles fixed transversely in the sluice andhaving peculiarlyarranged containing depressions for quicksilver.

It also comprises a combination of parts and details of constructionwhich will be more fully explained by reference to the accompanyingdrawings, in which Figure l is a side elevation, partly in section, ofmy apparatus. Fig. 2 is a plan view of same. Fig. 3 is a modified formof same.

In the drawings I have shown a section of my improved riflle which iscomposed of successive inclined surfaces with intermediate raised barsor riffles having a quicksilver-containing box upon either side of saidbars, one of said riffles being located at the bottom of each inclineand the other at the top and contiguous with the riffle-bar.

A represents the inclined surfaces of my improved riffle. These stand ata considerable angle, as shown, and from the lowest part of each ofthese inclines rises a bar or riffie 2. These bars extend transverselyof the sluice, filling the full space, and may be connected with thesides of the sluice or with independent sides, as at 3, which may becast or otherwise formed with the riffle.

At the upper edge of each incline and between it and the adjacenttransverse bar is a portion 1, arranged substantially at right angles tothe bar or riffle and which connects the top of the inclined portionwith an intermediate portion of the adjacent bar or ritlle, the uppersurface of said right-angled portion 1 being provided with a groove orchannel, as at 4. This channel lies between the upper edge of theincline and the bar, and a body of quicksilver may be placed in each ofthese grooves and will extend from side to side of the sluice.Quicksilver may also be placed in the lowest portion or depressionformed at the junction of the lower edges of the inclined surfaces andthe vertically-disposed bars. Across the tops of these bars andextending lengthwise of the sluice are the bars 5, resting upon the topsof the bars 2. These bars 5 serve to carry off any rocks or largematerial which it is not desirable to have reach the lower part of theriffle, and by reason of their substantially straight and smooth surfacethe rocks and larger material will roll or slide along these bars and bedischarged without falling into and clogging these riflles. Theserifiles may be used in sluices having a very considerable incline orgrade, and the passage of the material through and over them with aplentiful supply of water causes a constant boiling or agitation, andthe gold will be deposited in each of the transverse channels containingthe quicksilver where there is less current and agitation.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, .is

1. In a gold-saving apparatus, a sluice, a structure contained thereinconsisting of a succession of walls arranged substantially at rightangles with the plane of the sluice, intermediate inclines having asteeper inclination than that of the sluice, transversemercury-containing channels at the top of each incline and below the topof the walls, and other channels at the junction of the inclines withthe bases of the walls.

2. In a gold-saving apparatus, an inclined sluice, a ril'fled bottomtherefor, said bottom consisting of a succession of surfaces having aninclination greater than that of the sluice, intermediate transversedams arranged substantially at right angles with the plane of thesluice, mercury-containing channels at the junction of the lower edgesof the inclines and the dams, and other mercury-containing channels atthe upper edges of the inclines and below the tops of the dams toreceive the vertical fall therefrom.

3. In a gold-saving apparatus, a means for separating gold fromassociated mineral, said means consisting of a sluice having a bottomcomposed of a series of rapid inclines and intermediate dams arrangedsubstantially at right angles with the plane of the sluice, with Intestimony whereof I have hereunto set mercury-containing channels at thejunction my hand in presence of two subscribing wit of the lower edgesof the inclines and the nesses.

bases of the dams, and other mercury-con- ISAAC P. LAMBING.

. taining channels located between the upper Witnesses:

edges of the inclines and the faces of the dams D. S. MORRISON, andbelow the upper edges of the dams. H E. D. DE SOTO.

